/Engine/Source/Runtime/Engine/Public/BatchedElements.h
Adds a mesh vertex to the batch.
int32 AddVertexf ( const FVector4f & InPosition, const FVector2f & InTextureCoordinate, const [FLinearColor](API\Runtime\Core\Math\FLinearColor) & InColor, [FHitProxyId](API\Runtime\Engine\FHitProxyId) HitProxyId )